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| United States Patent |
5,654,086
|
|
Nishijima
, et al.
|
August 5, 1997
|
Durable hydrophilic fibers, cloth articles and molded articles
Abstract
Improvement in a hydrophilic function and in the strength of a cloth
article obtained from a durable hydrophilic fibers is attained by the
employment a durable hydrophilic fiber consisting of a fiber made of a
thermoplastic resin to which 0.2 to 1.0% by weight of a mixture formed of
the following surfactant (A),(B), (C), (D) and (E) is adhered:
(A) 10 to 30% by weight of one or more compounds selected out of
polyoxyalkylene additive of higher alcohol or higher alkylamine of carbon
number 28 to 50, or amide formed of fatty acid of carbon number 30 to 50
and polyamine,
(B) 10 to 30% by weight of a polyoxyalkylene additive of amide formed of
fatty acid of carbon number 20 to 28 and polyamine,
(C) 30 to 50% by weight of an amide formed of higher fatty acid of carbon
number 16 to 28, and alkanolamine,
(D) 10 to 30% by weight of polyoxyalkylene additive of alkylphosphate salt
of carbon number 10 to 22, and
(E) 2 to 10% by weight of alkylsulfonate salt of carbon number 12 to 16.
| Inventors:
|
Nishijima; Masaru (Shigaken, JP);
Suzuki; Masayasu (Shigaken, JP)
|
| Assignee:
|
Chisso Corporation (Osaka, JP)
|
| Appl. No.:
|
683631 |
| Filed:
|
July 15, 1996 |
Foreign Application Priority Data
| Current U.S. Class: |
442/199; 428/365; 428/373; 428/374; 428/375; 428/395; 442/200; 442/201; 442/301; 442/361; 442/362; 442/363; 442/364; 442/414 |
| Intern'l Class: |
D03D 003/00 |
| Field of Search: |
428/229,253,365,373,374,375,395
|
References Cited
U.S. Patent Documents
| 5532052 | Jul., 1996 | Eng et al. | 428/229.
|
| 5540965 | Jul., 1996 | Nishimura et al. | 428/229.
|
| Foreign Patent Documents |
| 63-6166 | Jan., 1988 | JP.
| |
| 63-49158 | Mar., 1988 | JP.
| |
| 1-148879 | Jun., 1989 | JP.
| |
| 1-148880 | Jun., 1989 | JP.
| |
| 63-303184 | Dec., 1989 | JP.
| |
| 2-169774 | Jun., 1990 | JP.
| |
| 3-59169 | Mar., 1991 | JP.
| |
| 3-50030 | Jul., 1991 | JP.
| |
Primary Examiner: Foelak; Morton
Attorney, Agent or Firm: Lowe, Price, LeBlanc & Becker
Claims
What is claimed is:
1. A durable hydrophilic fiber consisting of a fiber made of a
thermoplastic resin to which 0.2 to 1.0% by weight of a mixture formed of
the following surfactant (A),(B), (C), (D) and (E) is adhered:
(A) 10 to 30% by weight of one or more compounds selected out of
polyoxyalkylene additive of higher alcohol or higher alkylamine of carbon
number 28 to 50, or amide formed of fatty acid of carbon number 30 to 50
and polyamine,
(B) 10 to 30% by weight of a polyoxyalkylene additive of amide formed of
fatty acid of carbon number 20 to 28 and polyamine,
(C) 30 to 50% by weight of an amide formed of higher fatty acid of carbon
number 16 to 28, and alkanolamine,
(D) 10 to 30% by weight of polyoxyalkylene additive of alkylphosphate salt
of carbon number 10 to 22, and
(E) 2 to 10% by weight of alkylsulfonate salt of carbon number 12 to 16.
2. A durable hydrophilic fiber according to claim 1, wherein the fiber is a
composite fiber in which at least two components of thermoplastic resin
are arranged in side-by-side type or in sheath-and-core type.
3. A durable hydrophilic fiber according to claim 1, wherein the fiber is a
composite fiber in which at least two components of thermoplastic resin
are arranged in radial split type or in sea and island type.
4. A durable hydrophilic fiber according to claim 1, wherein at least one
component of thermoplastic resin constituting the fiber is a polyolefin
resin.
5. A durable hydrophilic fiber according to claim 1, wherein at least one
component of thermoplastic resin constituting the fiber is a polyester
resin.
6. A cloth article obtained by confounding and/or adhering the durable
hydrophilic fiber according to claim 1.
7. A cloth article obtained by knitting or weaving the durable hydrophilic
fiber according to claim 1.
8. A molded article obtained by the durable hydrophilic fiber according to
claim 1.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to durable hydrophilic fibers, and more
specifically, to durable hydrophilic fibers, and cloth articles and molded
articles obtained by using the fibers which are useful for surface
materials for paper diapers, sanitary napkins, etc. mainly in the field of
hygienic materials, useful for form retaining goods and molding retaining
goods of moisture absorbent articles, and useful for industrial and
medical wiping clothes.
2. Description of the Prior Art
A paper diaper or the like is formed with three layers, i.e., a surface
material, an absorbent material and a back material from the side with
which the skin touches when worn. The surface material need to have a
water permeability by which a liquid to be absorbed is rapidly transmitted
to the absorbent material, and a dry touch property by which the absorbed
liquid is prevented from back flowing to impart the skin dry feeling.
Hydrophilic property is preferred in order to improve the water
permeability, and hydrophobic property is preferred in order to improve
the dry touch property. For achieving the aforesaid object, nonwoven
fabrics are used in which a small amount of surfactant is adhered to
fibers formed of a polyolefin resin or a polyester resin (Japanese Patent
Application Laid-Open No. 63-6166 Publication and Japanese Patent
Application Laid-Open No. 63-49158 Publication).
In the surface material using the fibers to which the surfactant is adhered
as described above, when liquids are absorbed once or twice therefrom, the
surfactant flows out and the water permeability rapidly lowers so that the
liquids remain on the surface material, resulting in imparting
unpleasantness. As the material which reduces the flow-out of the
surfactant adhered to the fibers and in which even if water is permeated
repetitively, the hydrophilic property is not lowered, nonwoven fabrics
formed of durable hydrophilic fibers to which is adhered a surfactant
containing a water soluble modified silicone have been known (Japanese
Patent Application Laid-Open Nos. 63-303814, 1-148879, 1-148880, 2-169774
and 3-59169 Publications).
However, these nonwoven fabrics or woven fabrics formed of the durable
hydrophilic fibers to which the surfactant is adhered were good in the
durable hydrophilic property but were suffered from a problem in that
since the water soluble modified silicone is contained as an essential
composition, the friction of fibers reduces, the fibers constituting a
fiber laminate such as nonwoven fabrics slips, and the strength of web
lowers and the strength of a fiber laminate such as nonwoven fabrics
lowers. There was a further problem in that also in the wrapping process
of the goods of the obtained cloth articles, since the smoothness between
the cloth articles is so high that the wrapping form of the goods is not
stable.
In Japanese Patent Application Laid-Open No. 3-50030 Publication, there is
proposed a method for imparting hydrophilic property for adhering a
mixture of alkyrol amide and an alkylene oxide additive of a compound
having an active hydrogen or a surfactant such as alkylphosphate to
polyolefin fibers. However, in this method, the durable hydrophilic
property is not sufficient, and the electric resistance is not good.
It is therefore an object of the present invention to provide durable
hydrophilic fibers, and cloth articles and molded articles using said
fibers, which have the durable hydrophilic property raised by the prior
art as described above, which reduces the slip of fibers not to lower the
strength of a fiber laminate such as nonwoven fabrics.
SUMMARY OF THE INVENTION
The present inventors have studied zealously in an attempt of solving the
above-described problems, and as a result, obtained a prospect capable of
overcoming the above-described problems by adhering a mixture of a special
surfactant composition as a finishing agent to the surface of fibers, thus
completing the present invention.
The present invention has the following constitutions:
(1) A durable hydrophilic fiber consisting of a fiber made of a
thermoplastic resin to which 0.2 to 1.0% by weight of a mixture formed of
the following surfactant (A),(B), (C), (D) and (E) is adhered:
(A) 10 to 30% by weight of one or more compounds selected out of
polyoxyalkylene additive of higher alcohol or higher alkylamine of carbon
number 28 to 50, or amide formed of fatty acid of carbon number 30 to 50
and polyamine,
(B) 10 to 30% by weight of a polyoxyalkylene additive of amide formed of
fatty acid of carbon number 20 to 28 and polyamine,
(C) 30 to 50% by weight of an amide formed of higher fatty acid of carbon
number 16 to 28, and alkanolamine,
(D) 10 to 30% by weight of polyoxyalkylene additive of alkylphosphate salt
of carbon number 10 to 22, and
(E) 2 to 10% by weight of alkylsulfonate salt of carbon number 12 to 16.
(2) A durable hydrophilic fiber according to claim 1, wherein the fiber is
a composite fiber in which at least two components of thermoplastic resin
are arranged in side-by-side type or in sheath-and-core type.
(3) A durable hydrophilic fiber according to claim 1, wherein the fiber is
a composite fiber in which at least two components of thermoplastic resin
are arranged in radial split type or in sea and island type.
(4) A durable hydrophilic fiber according to any of above (1) to (3),
wherein at least one component of thermoplastic resin constituting the
fiber is a polyolefin resin.
(5) A durable hydrophilic fiber according to any of above (1) to (3),
wherein at least one component of thermoplastic resin constituting the
fiber is a polyester resin.
(6) A cloth article obtained by confounding and/or adhering the durable
hydrophilic fiber according to any of above (1) to (5).
(7) A cloth article obtained by knitting or weaving the durable hydrophilic
fiber according to any of above (1) to (5).
(8) A molded article obtained by the durable hydrophilic fiber according to
any of above (1) to (5) alone or in mixture.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will now be described in detail.
As thermoplastic fibers used in the present invention, there can be
exemplified a combination of polyolefin-base, polyester-base and
polyamide-base thermoplastic resins.
In the case where these materials are used as a surface material
particularly in the field of hygienic materials, preferred are the
polyolefin-base, and polyester-base thermoplastic resins.
The polyolefin-base resin is a homopolymer of ethylene or propylene, or a
crystalline copolymer ethylene or propylene with other .alpha.-olefins, or
a mixture thereof. The .alpha.-olefin copolymer includes an olefin-base
copolymer or terpolymer mainly comprising propylene. Examples of these
copolymers include copolymers such as ethylene or butene-1 or
4-methylpentene-1 mainly comprising propylene. As polyester-base resins,
there can be exemplified polyethylene terephthalate, polybutylene
terephthalate, poly(ethylene terephthalate-co-ethylene isophthalate) or
polyether ester.
A mixture of a polyester-base resin or a polyamide-base resin and a
polyolefin-base resin can be suitably selected depending on uses.
In these thermoplastic fibers, an additive having other functions can be
combined into the fibers within the range for achieving the object of the
present invention, these capable of being selected while adjusting to uses
and suitably combined.
A mixture (hereinafter referred to as a finishing agent) comprising (A),
(B), (C), (D) and (E) of a surfactant composition used in the present
invention will be described below.
(A): One or more compounds selected out of polyoxyalkylene additive of
higher alcohol or higher alkylamine of carbon number 28-50, or fatty acid
amide formed of fatty acid of carbon number 30-50 and polyamine.
The polyoxyalkylene additive of higher alcohol or higher alkylamine is an
alkyleneoxide additive of saturated or unsaturated alcohol or amine that
may have a side chain of carbon number 28-50. If the carbon number is less
than 28, it is difficult to obtain a sufficient durable hydrophilic
nature. The polyoxyalkylene additive of fatty acid amide is likewise an
alkylene oxide additive of saturated or unsaturated fatty acid that may
have a side chain of carbon number 30-50 and polyamines, for example, such
as ethylenediamine, diethylenetriamine, triethylenetetramine, etc. or
diethylethylenediamine, aminoethylethanolamine, etc. If the carbon number
is less than 30, it is difficult to obtain a sufficient durable
hydrophilic property. If the carbon number exceeds 50, cost increases,
being not suitable for practical use.
A polyoxyalkylene group comprises a random or block copolymer of alkylene
oxide such as ethylene oxide, propylene oxide, butylene oxide, etc.,
particularly, ethylene oxide alone or ethylene oxide and propylene oxide,
and the additive mol number is 2-20 mol, more preferably, 5-15 mol.
Propylene oxide copolymerized is eqivalent mol to that of ethylene oxide,
or preferably less than that.
The compounding amount of (A) is 10-30% by weight, more preferably, 15-25%
by weight. If less than 10% by weight, a sufficient durable hydrophilic
property is not obtained. If exceeding 40% by weight, a solution viscosity
becomes so high that a solubility becomes poor.
(B): A polyoxyalkylene additive of fatty acid amide of carbon number 20-28.
The polyoxyalkylene additive of higher fatty acid amide is fatty acid
monoamide or fatty acid diamide obtained in a conventional reaction
between saturated or unsaturated fatty acid that may have a side chain of
carbon number 20 to 28, for example, such as aragin acid, behenic acid,
lignoceric acid, montanic acid, etc., and polyethylene polyamines, for
example, such as ethylene diamine, diethylene triamine, triethylene
tetramine, etc., or diethylethylenediamine, aminoethylethanoleamine, etc.
If the carbon number less than 20, the durable hydrophilic property is
poor, and if exceeding 28, the initial hydrophilic property is poor.
A polyoxyalkylene group is preferably an additive of 5-30 mol of alkylene
oxide, particularly ethylene oxide such as ethylene oxide, propylene
oxide, butylene oxide, etc. If the mol number of ethylene oxide is less
than 5, the solubility lowers, and if exceeding 30 mol, the liquid
transmittance of the cloth article becomes slow.
The compounding amount of (B) is 10-30% by weight, more preferably, 15-30%
by weight. If less than 10% by weight, a durable hydrophilic property as
intended is not obtained. If exceeding 30% by weight, a water absorbing
speed of the cloth article becomes slow.
Surfactant (C): An amide comprising higher fatty acid of carbon number
16-28 and alkanolamine. That is, this is obtained in a conventional
reaction between saturated or unsaturated fatty acid that may have a side
chain of carbon number 16-28 and alkanolamine, for example, such as
monoethanolamine, diethanolamine, monoisopropanolamine, etc. Particularly
suitable alkanolamide is a reaction mixture in 2:1 to 1:2 (equivalent
ratio) between higher fatty acids such as stearic acid, oleic acid,
behenic acid, erucic acid, etc. and diethanolamine. If the carbon number
is less than 16, a sufficient durable hydrophilic property is not
obtained, and if exceeding 28, cost increases, which not suitable for
practical use.
The compounding amount of (C) is 30-50% by weight, more preferably, 30-45%
by weight. If less than 30% by weight, a durable hydrophilic property
lowers. If exceeding 50% by weight, the cylinder wrapping results in the
carding process or the like, lowering the evenness.
With respect to the above-described three surfactants (A), (B) and (C),
HLB(hydrophile-lipophile balance)2-19, preferably 5-15 are generally
suitable, but it depends on the hydrophilic property of an anion
surfactant to be mixed.
(D): A polyoxylalkylene additive of alkylphosphate salt of carbon number
10-22. In the polyoxylalkylene alkylphosphate salt, an alkyl group is
preferably a saturated or unsaturated complete neutral salt that may have
a side chain of mono or diphosphate of such as decyl alcohol, laurel
alcohol, myristyl alcohol, etc. of carbon number 10-22, more preferably
10-14. A polyoxyalkylene group is alkylene oxide such as ethylene oxide,
propylene oxide, butylene oxide, etc. particularly, ethylene oxide alone
or a random or block copolymer of ethylene oxide and propylene oxide. The
mol number added is, in case of ethylene oxide alone, 2-10 mol, more
preferably, 3-7 mol.
The neutral salts include alkaline metal such as K, Na, etc., ammonia and
amine but are preferably K salt or Na salt in terms of electric
resistance. If the carbon number of alcohol is less than 10, the friction
between fibers and metal increases to lower the card transmittance,
resulting in the cylinder wrapping. Further, if exceeding 22, the electric
resistance lowers.
The compounding amount of (D) is 10-30% by weight. If less than 10% by
weight, the electric resistance is not sufficient, and if exceeding 30% by
weight, a durable hydrophilic property lowers.
The surfactant (E) is alkylsulfonate salt of carbon number 12-16. The
alkylsulfonate salt (E) particularly can obtain an excellent electric
resistance and examples thereof include petroleum sulfonic acid Na salt,
and alkylbenzenesulfonic acid Na salt. The petroleum sulfonic acid Na salt
of carbon number 12-16 is preferred in terms of affinity with the fibers.
The adequate using amount of (E) is 2-10% by weight, more preferably 5-10%
by weight. If exceeding 10% by weight, the cylinder wrapping and the
sticking to the cloth article result in the carding process.
It is preferred in the finishing agent adhered to the durable hydrophilic
fibers according to the present invention that the surfactants (A), (B),
(C), (D) and (E) are mixed in the above-described adequate using range, at
least 85% or more of the whole additives. It is to be noted that
conventional surfactants other than the above-described 5 surfactants can
be added within the range not impeding the object of the present invention
according to the thermoplastic resins constituting the fibers, cloth
articles and molded articles.
The adhesion amount of the finishing agent to the above-described
thermoplastic fibers is 0.2-1.0, more preferably 0.3-0.7.
If the adhesion amount is less than 0.2% by weight, the electric resistance
and the durable hydrophilic property are insufficient, and if exceeding
1.0% by weight, the cylinder wrapping and the sticking to the cloth
article result in the carding process.
The method for adhering these finishing agents to the thermoplastic fibers
has no particular limitation but well known methods such as adhesion by
contact with an oiling roll, immersion into an immersion tank and spraying
in spinning or drawing process, or adhesion by a contact method, an
immersion method and a spraying method after being processed to a fiber
laminate such as a web, a cloth article such as nonwoven fabrics or a
molded article can be used.
The durable hydrophilic fibers according to the present invention is
obtained by adhering the finishing agent to the thermoplastic fibers, and
sectional structures thereof may be a single structure or a composite
structure. Also, a section shape may be circular, irregular, hollow or the
like. The fiber form may be short fibers, long fibers, or crimped or not
crimped fiber according to uses, or a combination thereof.
In connection with the function of the finishing agent, the behavior during
the high pressure water flow process in a split type composite fiber as
one example will be described below.
Normally, for example, in a radial split type composite fiber formed of a
hydrophobic thermoplastic resin, a normal hydrophilic surfactant adhered
to the surface of fiber as a fiber finishing agent is washed away rapidly
in the process of forming into nonwoven fabrics by way of high pressure
water flow. Since these fibers are extremely strong hydrophobic in fiber
itself, the fiber avoids a water flow in the initial stage of the process
of forming into nonwoven fabrics by way of high pressure water flow,
failing to evenly receive shock energy of water. For this reason,
sufficiently evenly divided extremely fine fiber nonwoven fabrics are not
obtained unless increase of the number of stage of high pressure water
flows.
On the other hand, in the radial split type composite fiber adhered to the
finishing agent according to the present invention, the fiber itself is
formed of an extremely strong hydrophobic thermoplastic resin similarly to
the conventional case. However, since the finishing agent of the present
invention adhered to the surface of fiber is very gently discrete, the
hydrophilic property can be sufficiently maintained. Even if the process
for nonwoven fabrics by way of high pressure water flow is repeated, the
fiber evenly receives the shock energy of water without avoiding the water
flow, and sufficiently evenly divided extremely fine fiber nonwoven
fabrics can be obtained in less number of stages.
Further, in the durable hydrophilic fibers of the present invention, since
the finishing agent is very gently discrete in water in the wet process
such as paper making even in case of fibers using a hydrophobic resin such
as a polyolefin-base resin, the hydrophilic property of the fiber is
maintained and in-water dispersion retaining properties are excellent.
The cloth article using the durable hydrophilic fibers of the present
invention are produced by conventional methods. For example, there is a
method for obtaining nonwoven fabrics which comprises forming short fibers
into a fiber laminate by a dry method or a wet method, pressing by a
heating roll or supersonic wave, fusion by heating air, fiber confounding
by high pressure water flow or needles. A further method comprises using
spun yarns, continuous yarns or the like to obtain woven cloth by knitting
and weaving processes.
Further, the object of the present invention can be attained by adhering
the finishing agent to the once obtained cloth article, for example, the
cloth article according to the above-described method or the cloth article
obtained by a spun bond method, a melt blown method, a flush spinning
method or the like. Further, it is possible to impart an absorbent shape
retaining properties by cutting, out of the durable hydrophilic fiber
according to the present invention, the composite fiber arranged in
side-by-side type, sheath-and-core type, radial divided type and sea and
island type and mixing it with a water absorbent material such as pulp and
a high molecule absorbent resin and applying heat treatment thereto. In
general, the thermoplastic composite fiber causes the water absorbing
performance of the absorbent to low decreasing with the ratio of blended
cotton. However, since the durable hydrophilic fiber of the present
invention maintains the hydrophilic property, the water absorbing
performance rarely lowers.
The durable hydrophilic fibers, cloth articles and molded article according
to the present invention can be used in the wide field of the form
retaining materials for the surface material and absorbent in the field of
hygienic materials constructed as described above, the medical and
industrial wiping clothes, the absorbing pad, and fibers for reinforcing
architectural structures, liquid transport films, drainage, water
permeable sheets, etc. in the field of civil engineering and structure.
EXAMPLES
The present invention will be described in detail hereinafter but is not
limited to the following Examples and Comparative Examples as far as they
are not beyond the gist of the present invention.
In the Examples, the following properties evaluation methods were used.
(1) Electric resistance: 40 g of sample fibers were formed into webs using
a card testing machine at a speed of 7 m/min under the conditions of
temperature of 20.degree. C. and relative humidity of 45%. A voltage of
static electricity generated in the web was measured for evaluation in the
following references. If the voltage is less than 100 V, judgement was
made to be practically usable.
.largecircle.: less than 100 V
.DELTA.: 100 V or more but less than 500 V
x: 500 V or more
(2) Card passage: 40 g of material fibers were formed into webs using a
miniature card testing machine at a speed of 7 m/min under the conditions
of temperature of 30.degree. C. and relative humidity of 80%. After this,
a card testing machine is stopped, and a cylinder was observed for
evaluation in the following references.
.largecircle.: no wrapping
.DELTA.: partial wrapping
x: almost totally wrapping
(3) State of web: The state of web prepared by the above-described method
for evaluation in the following references.
.largecircle.: no nep, has tension and even
.DELTA.: partial nep
x: no tension in web, uneven
xx: waste cotton, or rupture of web
(4) Hydrophilic property of fiber: 5 g of sample fibers prepared by a card
machine or the like were packed into a cage made of copper wires having a
diameter of 3 cm, length of 8 cm and weight of 3 g. The cage was quietly
floated on the water level of a water vessel at a water temperature of
25.degree. C., and the time till the sample together with the cage sinks
into water was measured. The precipitated sample was immediately pulled
out of water and centrifugally dewatered and dried in air for 24 hours at
a room temperature. The precipitating time was measured in the same
procedure. This measurement was repeated three times. Judgement was made
such that if the precipitating time is less than 10 seconds, the
hydrophilic property was good, and if the measured value for the third
time was also less than 10 seconds, the durable hydrophilic property was
also good.
(5) Durable hydrophilic property of cloth article: 30 g/m2 (weight per unit
area) of cloth article was cut into 10 cm.times.10 cm, which was placed on
a commercially available paper diaper on which is placed a cylinder having
an inner diameter of 6 cm. 65 ml of water was poured into the cylinder to
allow the cloth article to pass therethrough to absorb it in the paper
diaper. After left for 3 minutes after pouring water, the cloth article
was put between two upper and lower filter sheets (Toyo Roshi, No. 50), on
which a plate (10 cm .times.10 cm) and a weight of weight 3.5 kg were
placed. They were left for 3 minutes and dewatered, after which dried in
air for 5 minutes. The obtained cloth article was placed on a filter sheet
(Toyo Rosi, No. 50). Water prepared to 23.degree..+-.2.degree. C. in an
isothermic water vessel was dropped (20 droplets in total) droplet by
droplet by a pipette from a height 1 cm from the cloth article while
displacing a position. The number of water droplets disappearing from the
surface of the cloth article in 10 seconds or less was measured. The
measured cloth article was placed on a commercially available paper
diaper. The similar operation was repeated three times.
(6) Tactile feeling: The tactile feeling of a sample cloth article was
determined in a functional test by ten examiners for evaluation in the
following references.
.largecircle.: 8 or more persons judged to be free from sticking and good
.DELTA.: 6 or less persons judged to feel sticking or to feel a sense of
incongruity.
x: 3 or more persons judged to feel sticking.
EXAMPLES 1 to 12 and COMPARATIVE EXAMPLES 1 to 12
A thermoplastic resin of component A: polypropylene, component B:
polyester, and component C: high density polyethylene was used to provide
a fiber having one of sections (a single structure (a single type), a
sheath-and-core type structure, a side-by-side type structure, a radial
16-split type structure (split type) and a sea and island arranged
structure (sea and island type). A finishing agent of various compositions
given in Tables 1, 2, 3 and 4 was adhered, and the obtained fiber was
formed into a cloth article in the following processes:
Process a: The fiber was formed into a card web by a miniature card
machine, and heat treated by a suction dryer (140.degree. C.) to obtain
nonwoven fabrics of about 30 g/m2.
Process b: The fiber was formed into a card web by a miniature card
machine, and heat treated by an emboss roll (130.degree. C., line pressure
20 kg/cm) to obtain nonwoven fabrics of about 30 g/m2.
Process c: The fiber was subjected to spinning process to obtain spin yarns
of count 40. This spin yarns were knitted by a circular knitting machine
to obtain a knitted cloth.
See Tables 1, 2, 3 and 4.
The durable hydrophilic fibers, cloth articles and molded articles
according to the present invention are excellent in durable hydrophilic
property and free from sticky feeling. Therefore, in the case where the
above fibers are used, for example, as a surface material of a paper
diaper or a sanitary napkin in the field of hygienic materials, even after
use for long time, the absorbing performance with respect to body fluids
is not lowered, and the products agreeable to the touch are obtained.
TABLE 1
__________________________________________________________________________
Ex 1
Ex 2
Ex 3
Ex 4
Ex 5
Ex 6
__________________________________________________________________________
Compositions of the invention
A (C30)alkylether PO(5)EO(5)
20 28 20
(C30)alkylether EO(10)
20
(C30)alkylamine EO(10) 20
Melissic acid amide EO(10)*1
20
B Behenic acid amide EO(10)*2
25 25 25 25 25 10
C Stearic acid diethanol amide*3
35 35 35 35 30 50
D EO(5)laurel phosphate K salt
15 15 15 15 15 15
E (C14-C16)alkylsulfonate Na salt
5 5 5 5 2 5
Other compositions
(C26)alkylether EO(10)
Stearic acid amide EO(10)*3
Myristic acid diethanolamide
(C8)alkylphosphate K salt EO(5)
(C24)alkylphosphate K salt EO(5)
Polyether modified silicon (EO modified)
Sorbitan monolate
Laurel phosphate K salt
Adhesion amount (%)
0.5
0.5
0.5
0.5
0.4
0.5
Fibers
Resins Fiber structure
* * * * * **
First component
A A A A B A
Second component
C C C C C
Card Electric resistance
o o o o o o
passage Card passage
o o o o o o
State of web
o o o o o o
Hydrophilic
First 5.5
5.1
5.2
5.5
6.2
4.8
property(SEC)
Second 6.8
5.8
7.0
6.8
7.2
5.4
Third 7.2
6.6
7.5
7.5
7.9
6.5
Cloth article
Form of cloth article
(Process method)
a a a a a b
Durable Hydro-
First 20 20 20 20 20 20
philic property
Second 17 18 20 17 19 20
( /20) Third 15 16 16 15 16 17
Feeling o o o o o o
__________________________________________________________________________
*1 C29H59--CONH--C2H4--NH(EO)10--C2H4--NHCO--C29H59 EO: ethylene oxide
*2 C21H43--CONH--C2H4--NH(EO)10--C2H4--NHCO--C21H43 PO: propylene oxide
*3 C17H35--CONH--C2H4--NH(EO)10--C2H4--NHCO--C17H35
*Sheathand-core
**Single
TABLE 2
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Ex 7
Ex 8
Ex 9
Ex 10
Ex 11
Ex 12
__________________________________________________________________________
Compositions of the invention
A (C30)alkylether PO(5)EO(5)
10 20 15 20 20 20
(C30)alkylether EO(10)
(C30)alkylamine EO(10)
Melissic acid amide EO(10)
B Behenic acid amide EO(10)
30 20 10 25 20 20
C Stearic acid diethanol amide
40 40 40 35 35 40
D EO(5)laurel phosphate K salt
15 10 30 12 10 10
E (C14-C16)alkylsulfonate Na salt
5 10 5 5 5 5
Other compositions
(C26)alkylether EO(10)
Stearic acid amide EO(10)*3
Myristic acid diethanolamide
(C8)alkylphosphate K salt EO(5)
(C24)alkylphosphate K salt EO(5)
Polyether modified silicon (EO modified)
3
Sorbitan monolate 10
Laurel phosphate K salt 5
Adhesion amount (%)
0.5
0.5
0.5
0.3
0.5
0.5
Fibers
Resins Fiber structure
* *4 *5 ** * *6
First component
A A A A A A
Second component
C C C C C
Card Electric resistance
o o o o o 0
passage Card passage
o o o o o o
State of web
o o o o o o
Hydrophilic
First 5.0
4.7
4.5
5.2
4.8
4.1
property(SEC)
Second 6.2
6.4
7.2
6.3
6.6
6.8
Third 6.9
6.6
8.0
7.2
7.4
8.2
Cloth article
Form of cloth article
(Process method)
a a a c a a
Durable Hydro-
First 20 18 20 20 19 20
philic property
Second 18 16 17 19 18 17
( /20) Third 16 15 15 17 16 15
Feeling o o o o o o
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*Sheath-and-core
*4 split
*5 sideby-side
**single
*6 sea and island
TABLE 3
__________________________________________________________________________
C.Ex 1
C.Ex 2
C.Ex 3
C.Ex 4
C.Ex 5
C.Ex 6
__________________________________________________________________________
Compositions of the invention
A (C30)alkylether PO(5)EO(5)
5 20 20 45 10 20
(C30)alkylether EO(10)
(C30)alkylamine EO(10)
Melissic acid amide EO(10)
B Behenic acid amide EO(10)
30 25 25 10 25
C Stearic acid diethanol amide
35 35 35 40 10 40
D EO(5)laurel phosphate K salt
20 15 15 10 10 15
E (C14-C16)alkylsulfonate Na salt
10 5 5 5 10
Other compositions
(C26)alkylether EO(10)
Stearic acid amide EO(10)
Myristic acid diethanolamide
(C8)alkylphosphate K salt EO(5)
(C24)alkylphosphate K salt EO(5)
Polyether modified silicon (EO modified)
50
Sorbitan monolate
Laurel phosphate K salt
Adhesion amount (%)
0.4 1.5 0.1 0.5 0.5 0.5
Fibers
Resins Fiber structure
* * * *5 * *
First component
A A A A A A
Second component
C C C C C C
Card Electric resistance
o o x .DELTA.
o x
passage Card passage
o x x x o .DELTA.
State of web
o .DELTA.
xx .DELTA.
x x
Hydrophilic
First 4.9 4.9 17.3
7.8 5.2 5.4
property(SEC)
Second 11.3
5.5 -- 9.7 6.3 5.7
Third -- 6.2 -- 18.2
7.0 6.1
Cloth article
Form of cloth article
(Process method)
a a -- a a --
Durable Hydro-
First 5 20 -- 15 18 --
philic property
Second -- 20 -- 15 17 --
( /20) Third -- 20 -- 12 15 --
Feeling o x -- x o --
__________________________________________________________________________
TABLE 4
__________________________________________________________________________
C.Ex 7
C.Ex 8
C.Ex 9
C.Ex 10
C.Ex 11
C.Ex 12
__________________________________________________________________________
Compositions of the invention
A (C30)alkylether PO(5)EO(5) 20
(C30)alkylether EO(10)
20
(C30)alkylamine EO(10) 20
Melissic acid amide EO(10) 20
B Behenic acid amide EO(10)
25 25 25 25 20
C Stearic acid diethanol amide
35 35 35 35 35
D EO(5)laurel phosphate K salt
15 15 15
E (C14-C16)alkylsulfonate Na salt
5 5 5 5 5
Other compositions
(C26)alkylether EO(10)
20
Stearic acid amide EO(10)
25 25
Myristic acid diethanolamide
35
(C8)alkylphosphate K salt EO(5)
15
(C24)alkylphosphate K salt EO(5) 15 15
Polyether modified silicon (EO modified)
Sorbitan monolate
Laurel phosphate K salt
Adhesion amount (%)
0.5 0.5 0.5 0.5 0.5 0.5
Fibers
Resins Fiber structure
* * * * * *
First component
A A A A A A
Second component
C C C C C C
Card Electric resistance
o o o o x o
passage Card passage
o o o x .DELTA.
o
State of web
o o o x x o
Hydrophilic
First 4.8 5.1 4.2 4.0 8.2 4.0
property(SEC)
Second 8.8 8.3 12.0
16.8
12.2
17.2
Third 30.2
26.6
27.5
47.5
20.9
57.9
Cloth article
Form of cloth article
(Process method)
a a a a a a
Durable Hydro-
First 13 15 12 8 -- 7
philic property
Second -- 10 -- -- -- --
( /20) Third -- -- -- -- -- --
Feeling .DELTA.
o .DELTA.
.DELTA.
-- o
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